Pressure-regulator.



J. H. PEARSON.

PRESSURE REGULATOR.

APPLICATION FILED JULY 31.19151 Patented Sept. 19, 1916.

wNcNm N Inventor;

Witnesses UNITED STATES PATENT OFFICE.

JAMES H. PEARSON, 0F BLOOMFIELD, INDIANA, ASSIGNOB TO CYRUS L. SLINKARD, OF BLOOMFIELD, INDIANA.

PRESSURE-REGULATOI Specification of Letters Patent.

Application filed July 31, 1915. Serial No. 42,984.

To all whom-it may concern:

Be it known that I, JAMES H. PEARSON, a citizen of the United States, residing at Bloomfield, in the county of Greene and State of Indiana, have invented a new and useful Pressure-Regulator, of which the following is a specification.

This invention relates to pressure regulators especially designed for use in connection with air pumps employed in inflating pneumatic tires, one of the objects of the invention being to provide a device of this character which can be set to any pressure desired but which, when said pressure is reached, will allow a portion of the air under pressure to escape through a whistle which willbe sounded, thus to indicate that the pressure desired has been attained.

A further object is to provide a structure of this character which is simple and compact in construction and which can'be applied readily to pumps already in use.

Another object is to provide a structure of I this character which may be readily adjusted to indicate any predetermined pressure.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts 'and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, Without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings: Figure 1 is an enlarged side elevation of the regulator. Fig. 2 is a section therethrough.

Referring to the figures by characters of reference 1 designates a valve casing having an interior shoulder 2 against which is fitted a disk 3 constituting a valve guide, this disk having a central opening 4. That end of the casing 1 adjacent the disk 3 is exteriorly screw threaded, as at 5 so as to be detachably engaged by a screw cap 6 having a large valve receivingopening 7, this cap serving to retain within the end of casing 1 and against the disk 3, a ring or gasket 8 preferably of rubber, opening through which flares outwardly from the wall of the opening 4. The opposite end of the casing 1 has an exteriorly threaded nipple 9 extending therefrom, there being an interior annular shoulder 10 within the nipple constituting a valve seat. The nipple is adapted to be engaged by the threaded wall of a bore 11 extending into a block 12 which is screwed onto said nipple and has a stem 13 extending laterally therefrom, this stem being reduced and serrated, as at 14, so as to engage and retain a flexible tube 15 extending from the air pump, not shown. A passage 16 is extended through the stem 13 and opens into the bore 11.

A cylindrical valve 17 is mounted within an opening 18 formed in the end wall of casing 1 and opening into the nipple 9 and this valve is also slidably mounted in the opening 4 in disk 3. Said valve has an annular head 19 at one end which is adapted to bear against the seat 10, there being a stud 20 projecting from the center of the head and surrounded by one end of a coiled spring 21 the other end of which bears against the inner end of the end wall of the bore 11. This spring serves to hold head 19 normally pressed against the seat 10. The other end of valve 17 is slightly tapered, as shown at 22 and projects into the opening in the gasket 8. This end of the valve has a 1ongitudinal bore 23 intersected by a diametrical bore 2-1 located at all times between the disk 3 and the end wall of the casing 1. In other words, the bores 23 and 24 constantly maintain communication between the interior of casing 1 and the opening in the gasket 8. Extending longitudinally within the valve 17 is a groove 25 which terminates at the head 19.

Extending radially from the casing 1 is a cylindrical arm 26 communicating through an opening 27 with the interior of the casing 1 and provided with an interior annular shoulder 28 constituting a valve seat. The arm 26 is provided with exterior. screw threads as shown at 29, the same being engaged by a screw cap 30. This screw cap has its outer end provided with a concaved inner face and with a central orifice 31. A disk 32 is fitted in the screw cap and beyond the outer end of arm 26 and has a concave outer face 33 and a central orifice 34. The two concave faces of the cap 30 and the disk 32 cooperate to form an air chamber 34' therebetween so that air flowing under pressurejfrom the orifice 34 to the orifice 31 will produce a whistling sound.

A valve 35 bears normally upon the seat "28 and has a stud. 36 surrounded by a heavy coiled spring 37. This coiled spring has one end in contact with the disk 32. Obviously by screwing the cap 30 onto the arm 26, the tension of thes ring 37 can be increased with the result t at greater pressure will be required to lift the valve off. of its seat 28. An index. or pointer 38 is provided on the periphery of the cap 30 and is adapted to move into register with any one of a series of graduations 39 formed about the arm 26. A stop screw 40 or the like is provided 'on the arm 26 to limit the rotation of the cap 30 after the index or pointer 38 has been brought to the highest graduation, or, in other words, when the spring 37 has been placed under its greatest compression.

In using the apparatus herein described, the cap 30 is rotated until the index or pointer 38 is'brought to a, graduation indicating the pressure desired in the tire to be inflated. The tube 15 extending from an air pump is then placed on the stem 13, after which the casing 1 is placed upon the valve of the tire, said valve being received in the opening 7 and the gasket 8, the gasket fitting snugly about it. The pressure of the valve against the end of valve 17 will cause the head 19 to be unseated and consequently air forcedthrough passage 16 and bore 11 will flow around the unseated valve and through the groove 25 into casing 1 and thence by way of bores 24 and 23 into the tire. When the pressure in the tire and in the casing reaches the predetermined point, the valve 35 will be unseated and a portion of the air will escape through the openings 34 and 31, thus producing a whistling sound which notifies the user that the desired pressure has been obtained. As soon as the device is removed from the tire valve, spring 21 will automatically close the head 19 against seat 10. Thus it will be seen that the apparatus is especially useful in connection with air storage tanks, in that it prevents leakage of air while the apparatus is not in use. i

What is claimed is I 1. An air pressure regulator including a valve casing having anbpening at one end for the reception of the valve of a tire being inflated, there being an air inlet at the other end of the casing, a valve normally closing the inlet, said valve having a passage therein for maintaining communication between the interior of the casing and the inengaging the casing and having an outlet opening, a disk fitted within and movable with the screw cap and having an opening therein, said disk and the end of the cap co-'- operating to form a whistle, and a spring interposed between the disk and a portion of the valve for holding the valve yieldingly to its seat thereby closing the outlet, said spring exerting a constant yielding pressure against the disk to bind it against the end of the cap.

2. A pressure regulator including a casing having a radial tubular arm integral therewith, counterbored and communicating with each other, there being a threaded nipple at that end of the casing remote from its counterbore, a non-yielding disk seated within the counter-bore in the casing, a gasket within the counterbore and backed by the disk, said gasket and disk having an aperture for the reception of the valve of a tire to be inflated, a valve slidably mounted within the apertures of the disk and gasket and normally closing communication between the interior of the casing and its nipple, there being means for maintaining communication between the interior of the casing and the opening in the gasket, a block detachably engaging the nipple and having a bore therein, a stem projecting-fromthe block and having a passage in communication with the bore, yielding means in the bore in the block for holdlng the valve to its seat, a valve in the counterbore of the arm, a spring for holding said valve in position for closing communication between the arm and the interior of the casing, and adjustable means for holding said spring under compression, said means constituting a combined whistle and outlet.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JAMES H PEARSON.

Witnesses:

CLAUDE E. GREGG, ARLEIGH Comm.

said casing and arm being a 

